Krsna Himself, as Lord Caitanya, seeing the pitiable condition of the present day, is directly giving free love of Godhead. Yet because love of God is being given freely and so easily, people do not care for it. My spiritual master used to say that if you take a langra mango, which is a first-class, topmost quality mango in India, very costly, very sweet and very tasteful, and go from door to door and try to distribute it freely, people will doubt: "Why has this man brought this langra mango? Why is he trying to distribute it freely? There must be some motive behind it." Similarly, Lord Caitanya distributed this Krsna consciousness langra mango very cheaply, but people are so foolish that they think, "Oh, they are simply chanting Hare Krsna; what is there to it? This is meant for the foolish, who cannot speculate and do not have any higher standard of knowledge."

From: Krsna consciousness, The Topmost Yoga System